Shocked and fearful Maine residents are keeping to their homes for a second night as hundreds of police and FBI agents search intently for Robert Card, a U.S.

    • jordanlund@lemmy.world
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      1 year ago

      From the source with the image:

      55 Grain 223 FMJ Ammo
      Average muzzle velocity – 2867 fps
      Average muzzle energy – 1004 ft/lbs
      Bullet drop at 500 yards – 75.02 inches

      147 Grain 308 FMJ Ammo
      Average muzzle velocity – 2672 fps
      Average muzzle energy – 2330 ft/lbs
      Bullet drop at 500 yards – 61.42 inches

      Slower bullet, just barely, but 2x the energy.

      Let’s see if I can find a ballistics gel video:

      https://youtu.be/-8dZxwz9NY4

    • baldingpudenda@lemmy.world
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      1 year ago

      Checkout ballistic performance for 308

      Here’s 223

      Look at the energy specifically. 308 is a 7.62mm wide projectile, compared to the 223,which is 5.56mm, meaning it’s much bigger. Normal 223 you can buy is gonna be 55 gr (4 g) while 308 has a much wider range between 150 gr (10 g) to 180 gr (11.7 g). While 308 is only going 80% of the speed of 223, it’s 3 times heavier.

      308 energy: 2,718 ft⋅lbf (3,685 J) 223 energy: 1,265 ft⋅lbf (1,715 J) That’s a little more than twice as much power.

      TL;DR 308 is used for hunting animals like deer and other mid size game, most states in the US do not allow 223 to be used for hunting those types of animals (underpowered)

    • 520@kbin.social
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      1 year ago

      It means you’ve got someone on the loose with the capacity and mindset to absolutely twat people at a distance. See for reference the Washington Sniper.

        • 520@kbin.social
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          1 year ago

          Correct. Now imagine someone who could fuck you up from MUCH further away

          • Stuka@lemmy.ml
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            1 year ago

            As it turns out it’s much more effecient to mass murder people at relatively close range than stupidly trying to take long range skill shots, so being afraid of boogy man sniper isn’t really a thing.

            • 520@kbin.social
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              1 year ago

              The problem is, everyone is now looking for him, so if he wants to continue his rampage, outskirt territory with a vantage point is the only option.

              That, or if he doesn’t value his life at all, do what he did last time.

    • Stuka@lemmy.ml
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      1 year ago

      Nothing in practical terms here. Range is irrelevant, this guy isn’t shooting people from 800 yards away. Power is largely irrelevant…somewhat more trauma from a bullet wound in certain circumstances.

      When talking about walking around murdering people the caliber of the rifle isn’t important in the slightest. It’s a rifle round, that’s all you really need to know.